You can only export PDF files as PostScript using the Action Wizard (and yes, that is possible, just check the "Export File(s) in alternate Format" on the "Save" action.
However, if you want to distill these PostScript files to PDF, you are what we call "refrying" these PDF files, which is in general a bad idea. You will end up with lower quality PDF files that lack a lot of information that was in the original files (transparency, layers, interactive content, some font information, some color information, ...).
Why do you want to do this? Maybe there is a better way to accomplish your goals without degrading your PDF quality.
Karl Heinz Kremer
PDF Acrobatics Without a Net
PDF Software Development, Training and More...
http://www.khkonsulting.com